Description from Amazon
Rubber Hot Water Bottle. This product has no bonded seams or edges. Sänger’s technically new developed hot water bottle is constructed from a single piece of rubber. The neck piece is now moulded integrally with the bottles walls, instead of being bonded, which truly makes the Sänger rubber hot water bottle durable, safe, and water-tight. Heat lasts up to 8 hours. Ships from the United States. Available in different colors; selection depends on manufacturing, importing, and stock schedules. Since this item is considered hygienic, it may not be returned once the outer plastic seal has been broken.
- Highly durable: constructed from a single piece of rubber, strong seal/gasket
- Ribbed sides emit the heat slower
- Warmth lasts up to 10 hours